Pump.



A. L. DE LEEUW. PUMP.

191s. 1,1 31 ,044, Patented Mar. 9, 1915. 2 SHEETSSHEET 1.

A. L. DE LEEUW.

Patented Mar. 9, 1915.

2 SHEETS-SHEET 2.

M Hwwomm UNITED STATES FATE @FFICE.

ADOLPH L. DE LEE'U'W, OF CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATI MILLING MACHINE COMPANY, OF CINCINNATI, (EH10, A ORPORATIDN OF OHIO.

PUMP.

Application filed June 27, 1913.

To all whom it may concern Be it known that I, AnoLPH L. Dn LEEUW, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Pump, of which the following specification is a full. disclosure.

This invention relates to centrifugal pumps, and it has for its primary object to create a pump structure especially adapted for usein connection with machine tools for pumping oil or other fluids t0 the operating parts. Y Prevailing types of centrifugal oil pumps are less efiicient than they should be. and cannot be relied upon always to yield the copious flow of oil essential to the lubrication of machine tools.

The primary-object of this invention is t0 create a simple compact pump organization which will have a high capacity or output and which will operate with certainty.

Another object is to devise a simple and compact pump unit consisting of the neces sary operative elements and well adapted for being applied to various machine tools with very little labor.

Other objects will be in part obvious from the annexed drawings and in part indicated in connection therewith by the fol lowing analysis of this invention.

This invention accordingly consists in the features of construction, combination of parts, and in the unique relations of the members and in the relative proportioning and disposition thereof; all as more completely outlined herein. v

To enable others skilled in the art so fully to comprehend the underlying features thereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form have been annexed a part of this disclosure, and in such drawings, like cl n acters of reference denote corresponding parts throughout all the views, of which Figure 1 is a vertical median section show ing the operative elements of this pump unit, and illustrating the same in relation with an oil well of a machine tool. Fig. 2 is a view showing the interior of the casing containing the centrifugal blades, the bot- Specification or Letters ia'tent.

Patented Mar. 9, 1915.

Serial No. 78,017.

tom plate being remeved. plan view of this device.

Continuing now by way of a more detailed description, it may be noted that the pump proposed by this invention preferably consists of two parts, first, a pump unit 001.1; taming all the necessary operative elements, second, a receptacle or well to which said unit is detachably secured.

Referring to Fig. 1, A indicates a casting preferably in one piece, consisting of a plate member 1, adapted to tit on the edges 2 of the oil-well or receptacle B, which'ma, be of any shape. A hearing 3 is provided by the casting A and it also provides a wall 4 forming, in connection with a removable cover plate 5, an annular chamber adapted to contain the fan of the pump. A verti shaft C is journalcd in the bearing 3 and also preferably has a bearing at 6, and at upper end carries a bevel-gear T which is mesh with a bevel gear 8 mounted on a shaft 9 that in this instance is journaled in a bushing 10 secured in a laterally ex.- tending hub-lil e portion 12 of the casting A. This shaft 9 is in turn driven by a suit Fig. 3 is a top able pulley 13 secured to its outer end. The

mit the passage of an extension 16 of the shaft C, enabling the latter, if desired, to be driven by said extension in case of modi lied conditions. L

The pump element proposed by this invention essentially unique in character, and is (l by It comprises a hub 17 from Whirl date a plurality of spiral fans i8 of the shape shown by Fig. 2. Each blade in cros tion is narrower at its lower edge, indicated by 19, and its c0ncave face 0 rves upwardly and toward the adjacent bi. c, as indicated by 20. These blades operate in close relations with the covers l and :3, and oil admitted through a central. apcztury or bottom plat= fin extension 22 projects into and through the aperture 21 and has a conical wall 23 leading from its apex to the V0! e of the blade 18. The purpose of this conical axial projection 22 is to initiate and maintain the flow of oil, and this is done by centrifugal action, the oil at its tip being thrown outwardly by centrifugal action tends to creep along the conical surface 23 and thus onto the blades 18, which are maintained thoroughly filmed with oil. Preferably, the periphery 24 of the aperture 21 converges in correspondence with the conical surface 23 of the projection.

The oil is thrown by the blades into the spiral space 25 formed by the end wall 26 of the chamber of the casing, and it enters a tangential passage way 27 and rises under pressure through an upwardly extending port 28 provided by the connecting web 29 of the casing. A suitable pipe conducts the oil from this port to the parts to be lubricated.

Without further elaboration, the foregoing will so fully reveal the gist of this in- Y vention that others can by applying current knowledge readily adapt it for various applications without omitting certain features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic orspecific aspects of this invention, and therefore such adaptations should and are intended to be comprehended within the meaning and range of equivalency of the following claim.

Having thus fully revealed my invention, I claim as new and desire to secure by Letters Patent of the United States A centrifugal pump of the nature disclosed combining a casting providing a dome, a cover-plate and a casing depending therefrom and forming a chamber underneath said cover-plate, and also providing a discharge aperture leading from said cham her and terminating through said coverplate, a centrifugal fan horizontally mount-- ed in said chamber, a shaft vertically extending from said fan to said dome, and means entering said dome for actuating said shaft.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

ADOLPH L. DE LEEUW. Witnesses:

OLIVER B. Kaisnn, CATHERINE l WOOD. 

